Boiler for radiator systems



2 Sheets-Sheet 1'.

(No Model.)

J J HOGAN BOILER FOR RADIATOR SYSTEMS.

No. 425,946. Patented Apr. 15, 1890.

(No Model.) 2 Sheets-Shet 2.

J. J; HOGAN; BOILER FOR RADIATOR SYSTEMS.

No. 425,946. Patented Apr. 15', 1890.

UNITED STAT S PATENT OFFICE.

JOHN J. HOGAN, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE HOGAN ENGINEERING COMPANY, OF NElV YORK.

BOILER FO R RADIATOR SYSTEMS.

SPECIFICATION forming part of Letters Patent No. 425,946, dated April 15, 1890.

Application filed Tanne 21, 1890. Serial No. 337,588. (ll'o model.)

To all whom, it may concern:

Be it known that I, JOHN J. HOGAN, a citizen of the United States, residing at Brooklyn, Kings county, New York, have invented certain new and useful Improvements in Boilers for Radiator Systems, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention consists in a particular construction for a boiler adapted especially for supplying water to hot-water radiators, and therefore wholly filled with water when in operation.

The invention is a specific form of that claimed in my pending application, Serial No.

337,587, filed January 21, 1890.

The object of the construction is to promote a free and active circulation within the boiler itself when the heating-radiators are not in use, and thereby prerent the burning of the metal, and also to economize the fuel consumed by exposing a comparatively thin water-ring to the gases escaping from the firebox'on their way to the chimney. Such ring is formed with an inner pocket, into which a considerable portion of the hottest gases is conducted, and from which it can escape only by a smoke passage extended laterally through the water-ring.

In the drawings, Figure 1 is an elevation of a boiler provided with my improvement; Fig. 2, a plan of the same; Fig. 3, a vertical section (where hatched) on line ac 5c in Fig. 2; and Fig. 4 is a horizontal section through the water-ring on line y y in Fig. 3.

The fire-box is shown herein formed with an annular water-leg a, and a hollow crownplate a, perforated by smoke-tubes t.

In full lines in Fig. 3 the water-ring c is shown tapered toward the bottom to present a comparatively thin body of water to the heated gases rising through the smoke-tubes t, and the top of the water-ring opens into a closed reservoir cl, having an outlet or flow pipe cl to deliver the heated water. A casingF extends from the top of the crown-plate to the reservoir, forming an annular smokespace 9 outside the water-ring and a combustion-chamber h between the bottom of the ring and the crown-plate. A pocket e, closed at the top by the reservoir, is formed within the center of the water-ring, and a central pipe Z) passes upward through the pocket and connects the top of the crown-plate with the middle of the reservoir. is formed laterally through the upper part of the water-ring to discharge the gases from the top of the pocket 6 into the smoke-space g, from which they escape upon the opposite side of the boiler by smoke-outlet 11, formed in the casing. An alternative construction for the ring is indicated in dotted lines 0 in which the bottom of the ring is extended outwardly and downwardly to the top of the crown-plate. Such a construction would furnish a narrower route for the heated gases, and thus keep them longer in contact with the water-heating surfaces, as it would prevent the gases from passing into the chamber g outside of the water-ring; but when the ring is shaped as indicated in full lines the bottom of the smoke'space g is preferably closed by an annular plate 0, fixed within the casing, which excludes the gases in like manner from the space g.

VVater-pipes 7c connect the bottom of the ring 0 with the bottom of the water-leg a, and inlets l are applied to the bottoms of such pipes to receive the return-fluid from the radiators. An inlet mis also shown in the rear side of the water-leg for a similar purpose.

Arrows are shown in the different parts of the boiler to indicate an upward circulation in the central pipe 0 and the water-leg and a downward circulation in the pipes it. Such circulation would occur when the fluid is confined within the boiler, and when the radiators supply a current of cold fluid to the inlets Z 'n m the circulation would also be upward through the central pipe Z) and would pass either upward or downward in the pipes 7c, as the variation of temperature in different parts of the boiler might require. WVhen the water-ring is extended downward to the crown-plate, as indicated in the dotted lines 0 the pipes 7c would be attached to its lower part the same as already described. The pipes 10 would at their upper ends be attached to the lower part of the water-ring, whether A smoke-passage c the same be extended downward to the crownplate or not.

The reservoir is shown covered with a removable plate secured by bolts 0, and the pipe I) is shown divided near the bottom of the water-ring and a connection formed by flanges n and suitable bolts. Such construction, like all the other features of the apparatus, is adapted especially for a manufacture of cast iron, the crown-plate and water-leg being made in one casting, the water-ring in another, and the cover to the reservoir in a third, with the parts of the pipe I) united to each integrally. A portion of the pipe b is shown extended upward within the reservoir to discharge the heated fluid near the top of the same, and thus prevent conflict between the separate currents of fluid rising in the pipe I) and descending in the water-ring.

A perforated and hollow crown-plate filled with water is obviously essential to my invention, that the heated gases may pass through the same and operate upon the waterring; and the essential feature of the waterring is the internal pocket e, closed at the top, in which the gases may operate, as well as upon' the outer side of the ring in the smoke-space g, whereby a very large amount of heating surface is secured in a cheap and simple construction.

By forming the smoke-passage 0' through the water-ring upon the opposite side of the boiler from the smoke-outlet t' the large portion of the gases which rise within the pocket 6 is compelled to move ,in contact with the exterior of the water-ring"half-way around the same to make its escape from the casing.

The water-leg is not absolutely essential to my invention, as its chief elements are the perforated crown-plate, the pocket within the water-ring, and the lateral passage near the top of the ring for the escape of the smoke.

The essential feature of thecrown-plate is aeonstruction in which the water is subdivided and exposed to the heated gases on their passage to the combustion-chamber 71. It is not material that the water-ring be tapered precisely as shown in the drawings, although such construction is the most favorable to the heating and circulation of the fluid, as desired.

The lowerpart of the water-ring is drawn in full lines in Fig. 3 and presents a narrow pointed edge to the heated gases in the combastion-chamber h, as indicated by the lines o in Fig. 4, and the pipes 7a are connected with such narrow ring by nozzles k, which are cast upon the same to admit the pipes.

Having thus set forth the invention, what is claimed herein is-- 1-. In a boiler, the combination, with a perforated crown-plate a,-of the water-ring c and reservoir (1, connected therewith by central pipe I), water-connections between the lower parts of the ring and of the crown-plate, the casing f, having smoke-outlet z', and the ring having the smoke-passage 0', extending from the inner pocket e to the smoke-space g between the ring and the casing, substantially as set forth.

ter-ring c and reservoir (Z, connected with the crown-plate by central pipe I), the water-ring being provided with the pocket 0 and passage 0, the casing f, having smoke-outlet '5 and forming the smoke-space g and combustionchamber h, pipes connecting the lower part of the ring with the crown-plate, and the annular plate 0, closing the bottom of the space g, the whole arranged and operated substantially as herein set forth.

4. In a boiler, the combination, with the perforated crown-plate a, having water-leg a, of the tapered water-ring c and reservoir (1, connected with the crown-plate by central pipe 7), projected upward into the reservoir, as described, the casing f, having smoke-outlet z'and forming the smoke-space g and combustion-chamber h, and the pipes is, extended outside the casing and connecting the lower parts of the water-ring and the water-leg, and the ring having the pocket 6 and the smokepassage 0', extending from the pocket e to the smoke-space 9 within the casing opposite to the smoke-outlet i, the whole arranged and operated substantially as herein set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN J. HOGAN. \Vitnesses:

Anson 0. KITTREDGE, THOS. S. CRANE. 

